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+clc

+//Chapter3: Modulation

+//Example3.5b, page no 139

+//Given

+Pd=944//Anode dissipation of the class C amplifier in watts

+Ma=0.6//modulation depth,

+Etta=0.6//efficiency

+Pout=(Etta*Pd/(1-Etta))//power dissipation at 60% modulation

+Pc=Pout/(1+(Ma^2/2))//Tx power

+Psb=Pout-Pc

+Pdc1=Pc/Etta//DC power inputto PA

+Paf=Psb/Etta// modulation power input to PA

+Eff=0.25// efficiency of the modulator

+Pdc2=Paf/Eff//DC power input to modulator

+Pdct=Pdc1+Pdc2//Total DC power to the system

+Effo=Pout/Pdct//Overall Efficiency

+Ma=1// 100% modulation

+Pt=Pc*(1+(Ma^2)/2)

+Psb=(Pc*Ma^2)/2

+Paf=Psb/Etta//modulating input power to PA

+Pdc2=Paf/Eff// DC power input to modulator

+Pd=Pdc2-Paf//Power dissipation at the modulator

+Effo1=Pout/(Pdc1+Pdc2)//Overall Efficiency

+mprintf('Tx power:%f Watts\n Power dissipation at the modulator is: %f Watts\n Overall Efficiency at0.6 modulation is:%f%c ',Pc,Pd,100*Effo,'%')

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